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| The straps are 12" apart on center so.... maybe 26" overall... The tank is around 60 gal (guesstmate). CF used to run a single vertical tank behind the cab when leinth laws were in force. It doesn't take much room. I have a duplicate set-up (and have had it for years) on my cab-over. If you engine starts quick (doesn't require a lot of cranking to get it to fire) you don't use much air at all. If it requires a lot of cranking, that tank is good for about 30 sec of crank time. That more then is needed for most engines in good shape.
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Looks good so far Geoff. How big is the tank? It doesn't look all that large, though on a bigger truck everything looks smaller  "IF" I end up extending my truck and changing to air ride, I'd have room for a tank like that. I'm wanting to add around ~3ft to frame which would give me room for a small bunk. It also won't hinder my garage space very much either. The previous owner has since sold the towing business and now works for Adelmans truck yard. I put a bug in his ear last weekend at lunch, so hopefully I can come up with parts cheap. He's looking for air ride cutoff and a 250+hp motor.
Larry
I'm no expert........but I did stay at a Holiday Inn Express last night.
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John Dameron (8/4/2008)
Seems that General Motors get the credit for building "designed obsolescence" into their cars in the early 1920's to increase sales and help them to keep up with Henry Ford's Model T.And getting worse in the 21st century 
Larry
I'm no expert........but I did stay at a Holiday Inn Express last night.
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Seems that General Motors get the credit for building "designed obsolescence" into their cars in the early 1920's to increase sales and help them to keep up with Henry Ford's Model T.
Vehicle enthusiast at Sweet Springs, WV
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| I got back from the trip... the A/C and Alt bracket on CAT 3406 is made from cast aluminum... It cracked clean thru by the time I got back... Replaced for the tune of $98.00! I think I weld one up out of steel to keep for when this one fails.. Installed the "spare" alternator that I "rebiult" in the parking lot on the outbound trip... It charges fine but might need a new pulley (belts rideing kinda deep), threw the "new" alternator in the sidebox so I am ready (It has a pulley on it so no need to swap). The worsed thing was a track-rod (panhard rod) for the front diff... (runs from one side rail to the "banjo" houseing to keep the axle "square" in the frame)... that cost $313.00.... A steel rod and two bushings!!! I have an old IHC air ride that I think I'll rob the track rod set-up from, the next time one of these wears out... they don't make/sell just the bushing... its off-set and has to be installed in a jig... I'll just cut the old mounts of the IHC and replace the mounts on the NEWAY with IHC (which can be re-bushed). It really gauls me when things are made poorly or made to break... The A/C mount should never have been made from cast aluminum... cast iron or a steel weldment... Not Marmons doing, CATs but still, you would think CAT would know better...
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John Costley (7/23/2008)
Rob,
This should help, its a specification guide that shows each type, gives dimensions, and explains the difference. http://www.delcoremy.com/LiteratureDownload/Documents/SpecGuide.pdf Over 7MB, might take awhile on dialup.Pretty handy, gives a load chart at the beggining for helping to figure out what size you need.John
Boy John, you sure come up with a lot of good links. It is much appreciated.
As for the alternator thing: Me, being a cheapskate, used the small Delco's. You know, the original alternator that Delco Remy came out with in 1963. It was cheap, and very available. I always said that I could go to any farm store and get one for less than 50 bucks. Throw the old one in the side ditch and keep on truckin'. But, I always rebuilt my own. Heck, I could get a new 72 amp stator for $12 and brushes for a couple of bucks. Bearings? - the front one could almost always be cleaned, greased and used again. I had two on my old '69 Freightliner, so kind of had a back up. Plus, I wasn't one for a lot of lights - just that much more to keep working. Also, I liked to keep a low profile. That was kind of hard with a 30 year old truck.
A couple of other points: a junk yard just up the road closed years ago, and I bought all the DR alternators they had - almost 100, so I had plenty of spare parts.
Another thing: My father worked in plant engineering at Delco Remy in Anderson, IN. In the school year of 1961-62, my sister were both in college at the same time. She was senior and I, a freshman. My dad worked so much overtime getting this alternator into production that he paid for everything. Try that today. But, you have to realize that I graduated from Purdue in four years for $5000 TOTAL. Again, try that today.
Fred Schrope - Upland, IN
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John Costley (7/23/2008)
Rob, This should help, its a specification guide that shows each type, gives dimensions, and explains the difference. http://www.delcoremy.com/LiteratureDownload/Documents/SpecGuide.pdf Over 7MB, might take awhile on dialup.Pretty handy, gives a load chart at the beggining for helping to figure out what size you need.John Very informative John, thanks for the link. I have saved it for future reference. My alternator is a 25SI series. The tag is non-existant but the unit is readily identified by the photos. Damn thing took 13 seconds, (measured with stopwatch) at 800 engine rpm to "pick up" last evening before I moved the truck. Time to get a move on a repair! Thanks, Rob
A larger hammer will surely make it fit....
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| Rob, This should help, its a specification guide that shows each type, gives dimensions, and explains the difference. http://www.delcoremy.com/LiteratureDownload/Documents/SpecGuide.pdf Over 7MB, might take awhile on dialup.Pretty handy, gives a load chart at the beggining for helping to figure out what size you need.John
_____________________________________________ John Costley ATHS Online Division Charter Member Sabattus,Maine
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| I had the one wire alt on my race car "rebuilt" a few years ago and I had them bump it up as big as it would allow without major parts change. It does 130a, but it does not like to stay ON while idling. It idles at near 1000 rpm, so it's not too slow. I find I have to kinda goose the throttle to show any kinda of charge. My only problem is a big elec fuel pump(140/hr), electric water pump, electric fan and MSD ignition really kill things in a hurry. The guy that did the work warned me that it might kick off at idle speed, and bring it back if it's a problem.
Larry
I'm no expert........but I did stay at a Holiday Inn Express last night.
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